Rigby C E, Pettit J R
Can J Comp Med. 1980 Oct;44(4):374-81.
Market-age broiler chickens from flocks infected with Salmonella typhimurium were killed after being placed in crates and subjected to simulated shipping conditions for five, 19 or 24 hours. The cloacal feces, ceca and exteriors of the birds were cultured for salmonellae to identify shedders, cecal carriers and external carriers respectively, and the results compared with those obtained from pen-mates killed at the time the tested birds were put into the crates. Carriage of S. typhimurium was significantly higher among birds placed in clean crates than among the uncrated controls, mainly due to an increase in cecal carriers (from 23.5% to 61.5%). This increase was not related to the time spent in the crate. Twenty-four chickens were placed in crates contaminated with Salmonella alachua and all 24 became carriers of this organism: 22 (91.5%) of these were cecal carriers and 18 (75%) were shedders. This contamination also spread to 15/24 chickens placed in clean crates and "shipped" in the same truck: six of these became cecal carriers and seven were shedders. These results indicated that chickens in shipping crates which are exposed to salmonellae under transport conditions may readily become infected and begin to shed salmonellae within 24 hours.
将感染鼠伤寒沙门氏菌鸡群中的上市日龄肉鸡装入板条箱后，使其经受模拟运输条件5小时、19小时或24小时，然后宰杀。对鸡的泄殖腔粪便、盲肠和体表进行沙门氏菌培养，分别以鉴定排菌鸡、盲肠带菌鸡和体表带菌鸡，并将结果与在试验鸡装入板条箱时宰杀的同栏鸡的结果进行比较。置于清洁板条箱中的鸡的鼠伤寒沙门氏菌携带率显著高于未装板条箱的对照鸡，主要原因是盲肠带菌鸡数量增加（从23.5%增至61.5%）。这种增加与在板条箱中停留的时间无关。将24只鸡置于被阿拉楚阿沙门氏菌污染的板条箱中，所有24只鸡都成为该菌的带菌鸡：其中22只（91.5%）为盲肠带菌鸡，18只（75%）为排菌鸡。这种污染还传播到了置于清洁板条箱并在同一辆卡车中“运输”的24只鸡中的15只：其中6只成为盲肠带菌鸡，7只为排菌鸡。这些结果表明，在运输条件下暴露于沙门氏菌的运输板条箱中的鸡很容易被感染，并在24小时内开始排出沙门氏菌。
